Nortel Networks NN47200-503 guide

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Nortel Networks NN47200-503 manual

Contents

Conﬁguration-IP Routing Protocols Restricted rights legend General Page Revision History Date Revised Version Reason for revision Revision History Contents Index 314 Series Switch Platforms Series Switch Model Key Features Preface Nortel Ethernet Routing Switch 5500 Series Documentation Related publications Finding the latest updates on the Nortel web site How to get help An Introduction to IP Routing Protocols IP addressing Subnet addressing Network and host boundaries in IP address classes IP routing IP routing using VLANs IP routing with VLANs Multinetting Network with Multinetting Brouter port Proxy ARP UDP broadcast Layer 2 versus Layer 3 mode Setting IP routingManagement Vlan Routing and management Step Action Address Resolution Protocol ARPEnd Static routes Proxy Address Resolution Protocol Proxy ARPProxy ARP Operation Routing Information Protocol RIP Non-local static routesRIP operation An Introduction to IP Routing Protocols RIP metrics RIP hop counts Receive Result Mode RIP send and receive modes Send Mode Description ResultRIP Send and Receive Modes Open Shortest Path First Ospf protocol LimitationsOverview Beneﬁts Ospf routing algorithm Ospf host route Ospf router typesOspf router types Router Type Description Ospf Enhancements Host route in LSA Ospf virtual link R3config-router#Following is an example for deleting a host route Example Conﬁguration Virtual link diagramConsider the following situation R1 config-router#auto-vlink Creating auto virtual link R1 config-router#no auto-vlink R3config#show ip ospfFollowing is an example for deleting an auto virtual link Deleting auto virtual link Route policies Accept In Policies Announce Out PoliciesRedistribution Policies Preﬁx Lists Virtual Router Redundancy Protocol Vrrp Equal Cost MultiPath Ecmp UDP broadcast forwarding Differences between Dhcp and BootP Summary of Dhcp relay operation Multiple BootP-DHCP servers Forwarding Dhcp packetsDhcp operation Forwarding Dhcp packets Multiple BootP/DHCP servers Setting DhcpTo set DHCP, take the following steps Global Dhcp relay commands Command Description Dhcp relay Interface Dhcp relay commands Command Description Dhcp relay forward path commands Command Description Avoiding duplicate IP addresses Automatic router ID change IP blocking Igmp snooping IP multicast propagation with Igmp routing , 5500 Series switch ﬁltering IP multicast streams 1 of 2 Series switch ﬁltering IP multicast streams 1 Series switch ﬁltering IP multicast streams 2 Igmp snooping conﬁguration rules An Introduction to IP Routing Protocols IP Routing Conﬁguration and Management Global IP routing conﬁguration Open Shortest Path First Ospf initial conﬁguration Basic Ospf conﬁguration Enable Ospf in Vlan Return to Global Conﬁguration modeBasic Asbr conﬁguration Assign an IP address to Vlan Enable Asbr functionality Log into the Ospf router conﬁguration modeConﬁguring Ecmp for Ospf IP conﬁguration commands Ip routing commandNo ip routing command Ip blocking-mode command Interface vlan command Ip address commandLayer 3 routable VLANs Interface vlan 1 No ip address command Adding secondary IP interfaces Step ActionDeﬁne a secondary IP interface on the Vlan No ip address A.B.C.D W.X.Y.Z Show vlan ip command shows routable Vlan conﬁgurations Show vlan ip commandRemove the primary IP interface from the Vlan Static route commands Show ip route static commandShow ip route command Syntax for the show vlan ip command is Show ip route summary command Ip route commandShow ip route summary Ip route A.B.C.D W.X.Y.Z O.P.Q.R No ip route command Ip route enable commandIp route A.B.C.D W.X.Y.Z O.P.Q.R enable No ip route A.B.C.D W.X.Y.Z O.P.Q.R Ip route disable command Traceroute commandIp route enable parameters Parameter Description Ip route A.B.C.D W.X.Y.Z O.P.Q.R disable Ip route weight command Address Resolution Protocol ARP commands Show arp commandShow ip arp command Show arp-table A.B.C.D Show ip arp static command Ip arp commandShow ip arp static Ip arp A.B.C.D aabbccddeeff unit / port vid No ip arp command Ip arp timeout commandProxy ARP commands Ip arp-proxy command Default ip arp-proxy command Show ip arp-proxy interface commandRouting Information Protocol RIP commands Router rip enable command Router rip command Network commandNo network command Timers basic holddown command Timers basic update command Timers basic timeout commandIp rip advertise-when-down command No ip rip advertise-when-down command Ip rip auto-aggregation commandNo ip rip auto-aggregation command Ip rip cost command Ip rip default-listen command No ip rip default-listen commandIp rip default-supply command No ip rip default-supply command Ip rip holddown command Ip rip in-policy commandNo ip rip in-policy command Ip rip listen command No ip rip listen command Ip rip out-policy commandNo ip rip out-policy command Ip rip poison command No ip rip poison command Ip rip proxy-announce commandNo ip rip proxy-announce command Ip rip receive command Ip rip supply command Ip rip send commandNo ip rip supply command Ip rip timeout command Ip rip triggered commandNo ip rip triggered command Show ip rip command Default router rip command Default default-metric commandDefault timers basic holddown command Default timers basic timeout command Default timers basic update command Default-metric commandDefault ip rip advertise-when-down command Default ip rip auto-aggregation command Default ip rip cost command Default ip rip default-listen commandDefault ip rip default-supply command Default ip rip enable command Default ip rip holddown command Default ip rip in-policy commandDefault ip rip listen command Default ip rip out-policy command Default ip rip proxy-announce command Default ip rip receive commandDefault ip rip send command Default ip rip supply command Default ip rip timeout command Default ip rip triggered commandOpen Shortest Path First Ospf commands Ip ospf apply accept command Ip ospf apply redistribute direct command Ip ospf apply redistribute rip commandIp ospf apply redistribute static command Ip ospf spf-run command Router ospf enable command No router ospf enable commandRouter ospf command Default router ospf command No accept adv-rtr command Area commandNo accept adv-rtr routeripaddress enable Accept adv-rtr parameters Parameter Description Area command is executed in the Router Conﬁguration mode No area commandArea parameters As-boundary-router command No as-boundary-router commandDefault-cost ethernet command No area command is executed in the Router Conﬁguration mode Default-cost gig-ethernet command Default-cost fast-ethernet commandDefault-cost ten-gig-ethernet command No host-route command Host-route commandFollowing table describes the parameters of this command Redistribute command No redistribute commandParameters for this command are listed below Redistribute routetype enable route-policy policyname Rfc1583-compatibility command No rfc1583-compatibility commandRouter-id command No router-id command No trap command Trap commandArea virtual-link command No area virtual-link command Word No area virtual-link message-digest-key command Area virtual-link message-digest-key commandNo area virtual-link A.B.C.D. W.X.Y.Z authentication- key No auto-vlink command Auto-vlink commandIp ospf advertise-when-down command Ip ospf area command Ip ospf authentication-key commandIp ospf authentication-type command Ip ospf cost command Ip ospf dead-interval command Ip ospf hello-interval commandIp ospf mtu-ignore command Ip ospf network command Ip ospf priority command Ip ospf primary-md5-key commandIp ospf retransmit-interval command Ip ospf transmit-delay command Ip ospf message-digest-key commandOspf show commands Syntax of the ip ospf message-digest-keycommand is Command Description Clear ip ospf counters command Clear ip ospf counters command Route policy commandsIp preﬁx-list command Clear ip ospf counters Ip preﬁx-list parameters Parameter Description Route-map commandRoute-map parameters Field Description Ip rip in-policy rmapname Ip rip out-policy rmapname Virtual Router Redundancy Protocol Vrrp commands Router vrrp enable commandNo router vrrp enable command Router vrrp command No ping-virtual-address enable command Send-trap enable commandNo send-trap enable command Ip vrrp address command Ip vrrp action command No ip vrrp address commandIp vrrp adver-int command Ip vrrp backup-master command No ip vrrp backup-master commandIp vrrp critical-ip command No ip vrrp critical-ip command Ip vrrp critical-ip-addr command Ip vrrp enable commandNo ip vrrp enable command Ip vrrp fast-adv command Ip vrrp fast-adv-int command No ip vrrp fast-adv commandIp vrrp holddown-timer command Ip vrrp priority command Show ip vrrp commandEqual Cost MultiPath Ecmp commands Rip maximum-path command Maximum-path command Ospf maximum-path commandShow ecmp command Brouter port commands Brouter commandNo brouter command No brouter port brouterport routing enable Show brouter command UDP broadcast forwarding commandsIp forward-protocol udp command Show brouter command is executed in the User Exec mode Clear ip forward-protocol udp counters command Ip forward-iprotocol udp command interface modeWhere the parameter 1-4094 speciﬁes the Vlan ID Clear ip forward-protocol udp counters Dhcp relay commands Ip dhcp-relay commandNo ip dhcp-relay command To set DHCP, perform the following procedure Show ip dhcp-relay counters command Show ip dhcp-relay fwd-path commandIp dhcp-relay fwd-path command Syntax for the show ip dhcp-relayfwd-pathcommand is Ip dhcp-relay fwd-path enable command Ip dhcp-relay fwd-path disable commandSyntax for the ip dhcp-relayfwd-path enable command is Dhcp feature is enabled by default No ip dhcp-relay fwd-path command Show vlan dhcp-relay commandDhcp relay feature is enabled by default No ip dhcp-relay fwd-path A.B.C.D O.P.Q.R Ip dhcp-relay min-sec 0-65535 mode bootp dhcp bootpdhcp Ip dhcp-relay broadcast commandIp dhcp-relay parameters Parameter Description No ip dhcp-relay broadcast command Address Resolution Protocol ARP conﬁgurationSyntax for the no ip dhcp-relay broadcast command is Ip dhcp-relay broadcast Adding a static ARP entry to a Vlan Changing the default ARP aging timeThis section contains the following topics Adding a static ARP entry to a brouter port Deleting a static ARP entryRouting Information Protocol RIP conﬁguration RIP conﬁguration tasks Enable RIP Disable Supply RIP Updates, if requiredDisable Listen for RIP Updates, if required Conﬁgure the interface, assign an IP address and add ports Enable Triggered Updates, if required 10 Conﬁgure send mode parameters11 Conﬁgure receive mode parameters Enable poison reverse Conﬁguring RIP RIP conﬁguration example Assign the IP address 10.1.20.2/24 to Vlan Assign the IP address 10.1.30.2/24 to Vlan Enable IP routing and RIP globally Enable RIP on the interface5530-24TFDconfig-if#ip rip listen disable Conﬁguring RIP version RIPv2 conﬁguration example Using RIP accept policies Add the route policy created in to both RIP core ports Accept policy conﬁguration Using RIP announce policies Conﬁgure the IP preﬁx list named Preﬁx2 with the IP address 5530-24TFDconfig# route-map rippol2 1 match network Prefix2 Open Shortest Path First Ospf conﬁgurationConﬁguring an IP Ospf interface Ospf interface example topology Ospf security IP Routing Conﬁguration and Management Conﬁgure MD5 authentication on R1 Conﬁgure MD5 authentication on R2Conﬁguring Ospf network types MD5 conﬁguration example Conﬁguring Ospf areas Ospf network example 5530-24TFDconfig-router# as-boundary-router enable Ospf normal area Ospf stub area Enable Ospf on R1 Ospf stub area example End Enable RIP globally and conﬁgure the RIP version 2 interface Nssa conﬁguration example Apply the RipDist route policy to RIP Out Policy Conﬁguring Area Border Routers ABR ABR conﬁguration example End Area ID Range Subnet/Mask Range Type Conﬁguring Autonomous System Border Routers Asbr0.2 172.3.0.0/16 Summary Link Summarize 100 Conﬁgure the RIP interface for RIP version 2 mode only Asbr distribution example 5530-24TFDconfig# ip prefix-list default 0.0.0.0/0 Controlling Nssa external route advertisements Enable Ospf External route advertisement example Apply route policy to RIP Out Policy Conﬁguring a multi-area complex Multi-area complex example IP Routing Conﬁguration and Management IP routing conﬁguration examples IP Routing Conﬁguration and Management R2 conﬁguration commands IP Routing Conﬁguration and Management IP routing conﬁguration examples R3 conﬁguration commands STP Phase IP routing conﬁguration examples IP Routing Conﬁguration and Management IP routing conﬁguration examples IP Routing Conﬁguration and Management IP routing conﬁguration examples IP Routing Conﬁguration and Management R4 conﬁguration commands IP Routing Conﬁguration and Management IP routing conﬁguration examples R5 conﬁguration commands IP routing conﬁguration examples IP Routing Conﬁguration and Management Show vlan ip Router R1 Status show vlanShow ip ospf Show ip ospf area Show ip ospf neighbor Show ip route Router R2 Status show vlan 10001 203.203.100.53 255.255.255.0 IfIndex Address Mask MacAddress100 10100 10.1.1.17 255.255.255.252 Show ip ospf interface Router R3 Status Show vlan Show ip rip Show ip rip interface Show route-map detail Show ip ospf redistribute172.1.1.1 203.203.100.52 IP Address Holddown Type Allow True IP routing conﬁguration examples Nbr Router ID Nbr IP Address Pri State RetransQLen Perm Router R4 Status Show vlan IP Routing Conﬁguration and Management Router R5 Status Yes Port Members 100 Vlan #100 Port None 0x0000 Port Members 1000 Vlan #1000 Port None 0x0000 Yes IP routing conﬁguration examples Diagnosing neighbor state problems Accessed by using the show ip ospf neighbor command Virtual Router Redundancy Protocol Vrrp conﬁguration Conﬁguring normal Vrrp operation Vrrp example topology Conﬁgure the ports for Vlan 2 on R1 Conﬁgure Vlan 2 on router R1 Create Vlan 2 on router R1Conﬁgure an Ospf interface for Vlan Conﬁgure the ports for Vlan 3 on R1 Conﬁgure Vlan 2 on router R2 Create Vlan 2 on router R2 Conﬁgure the ports for Vlan 2 on R2 Conﬁgure Vlan 3 on router R2 End Conﬁguring Vrrp with Smlt Vlan Conﬁguration for Router R2 5530-24TFD# config terminal 5530-24TFDconfig# interface mlt Conﬁgure the IST Vlan on R1 Conﬁgure IST Vlan 3999 on R1Conﬁgure IST MLT on R1 Conﬁgure the IST and add the IST to Vlan Enable Ospf interface on Vlan 2 of R1 5530-24TFDconfig-if# ist enable peer-ip 2.1.1.2 vlanCreate IP address for Vlan Create Smlt on R1 Enable Ospf interface for Vlan 2 on R2 Conﬁgure IST MLT on R2Conﬁgure an IST peer for R2 and add the IST to Vlan Create an IP address for Vlan Conﬁgure Vrrp VIP address for Vlan 2 on R2 Conﬁguration for R2 Conﬁguring Vrrp with SLT Mlt spanning-tree 2 stp all learning disableVrrp with SLT conﬁguration Conﬁguration for R2 R2 = R1 & 0x1FThe Least Signiﬁcant 5 bits are selected R1 = CRC32 SIP, DIPEcmpindex = R2 % ecmpcount + Displaying the IP routing table 5530-24TFDconfig#ospf maximum-pathEcmp conﬁguration example Displaying global Ecmp conﬁguration 5530-24TFD# show ecmp Protocol MAX-PATH Static1 Rip2 Ospf4 Creating a Layer 3 routable Vlan IP dialog Globals tab Following table describes the IP Address tab ﬁelds IP Vlan screenIP Address tab ﬁelds Field Description Insert IP Address screen IP routing Globals tabClick Insert IP screen Globals tab ﬁelds Field Description Addresses tabAddresses tab Addresses tab ﬁelds Field Description Routes tabIP dialog- Routes tab Filtering route information Routes tab ﬁelds Field Description Filter dialog ﬁelds Field Description Static Routes tab Click FilterTab will now be ﬁltered on the criteria speciﬁed Static Routes tab ARP tab Insert Static Route ﬁeldsField Description ARP tab ARP Interfaces tab Click Insert. The ARP tab is displayed with the new entryInsert ARP Entry screen Insert ARP Entry ﬁelds Field Description ARP Inspection Vlan tab IP screen ARP Interfaces tabARP Interfaces tab ﬁelds Field Description ARP Inspection-VLAN tab ARP Inspection port tab ARP Inspection-port tab TCP tab TCP tabTCP tab ﬁelds Field Description TCP Connections tab UDP Listeners tabTCP Connections tab TCP Connections tab ﬁelds Field Description UDP Listeners tab Ecmp tabUDP Listeners tab ﬁelds Field Description IP dialog Ecmp tab Global RIP conﬁgurationEcmp tab ﬁelds Field Description RIP dialog Globals tab RIP dialog Interface tab RIP interface conﬁgurationInterface tab ﬁelds Field Description RIP dialog Interface Advance tab Advanced RIP interface conﬁgurationInterface Advance tab ﬁelds Field Description RIP Statistics Stats tab Stats tab ﬁelds Field Description Vlan RIP conﬁgurationRIP Stats Graph dialog IP Vlan screen RIP tab RIP tab ﬁelds Field Description Ospf dialog General tab Global Ospf conﬁgurationGeneral tab ﬁelds Field Description Field Description Ospf area conﬁguration Ospf dialog Areas tab Areas tab ﬁelds Field Description To delete an Ospf area, use the following procedure Ospf area creationOspf area deletion Deleting an Ospf area Ospf dialog Stub Area Metrics tab Stub Area Metrics conﬁgurationStub Area Metrics tab ﬁelds Ospf dialog Interfaces tab Interface conﬁgurationInterfaces tab ﬁelds Field Description Field Description Interface Metric conﬁguration Ospf dialog If Metrics tab If Metrics tab ﬁelds Field Description Neighbor informationOspf dialog Neighbors tab Virtual interface information Click Refresh to update the informationNeighbor tab ﬁelds Field Description Virtual If tab Virtual Interface ﬁelds Field Description Virtual interface creation Creating an Ospf virtual interface Step Action Click Insert. The OSPF, Insert Virtual If dialog opens Enter the information in the ﬁelds on the Virtual If windowVirtual interface tab Insert virtual interface dialog Virtual interface deletion Automatic Virtual Link creationDeleting an Ospf virtual interface Step Action Creating an automatic Virtual Link Step Action Check the AutoVirtLinkEnable box Deselect the AutoVirtLinkEnable boxAutomatic Virtual Link Deletion Virtual neighbors information Virtual Neighbors tab Virtual Neighbors tab ﬁelds Field Description To create an Ospf host, use the following procedure Ospf Hosts informationOspf Host creation Hosts tab To delete an Ospf host, use the following procedure Ospf Host deletionCreating an Ospf host Step Action Deleting an Ospf host Step Action Ospf dialog Link State Database tab Link State Database informationLink State Database ﬁelds Field Description Ospf dialog Ext. Link State Database tab External Link State Database informationExt. Link State Database ﬁelds Field Area Aggregate conﬁguration Ospf dialog Area Aggregate tab Area Aggregate tab ﬁelds Field Description To create a new Ospf area aggregate, follow this procedure Area Aggregate creationInsert Area Aggregate dialog Insert Area Aggregate dialog ﬁelds Field Description Ospf redistribution conﬁguration Area Aggregate deletionDeleting an Ospf area aggregate Step Action To create a new redistribution entry, follow this procedure Redistribution creationOspf dialog Redistribute tab Redistribute tab ﬁelds Field Description Insert Redistribute dialog Redistribution deletionInsert Redistribute dialog ﬁelds Field Description Message Digest information Deleting a redistribution entry Step ActionOspf dialog Message Digest tab Message Digest tab ﬁelds Field Description Click Refresh to update the displayed information Message Digest creationInsert Message Digest dialog Insert Message Digest dialog ﬁelds Field Description Message Digest deletion Virtual If Message Digest informationDeleting an Ospf message digest entry Step Action Virtual If Message Digest tab Creating a Virtual If Message Digest entry Step Action Virtual If Message Digest creationVirtual If Message Digest ﬁelds Field Description Virtual If Message Digest deletion Ospf statisticsEnter the information in the ﬁelds provided Click Insert Deleting a Virtual If Message Digest entry Step Action Ospf dialog Stats tab Ospf Vlan Ospf statistics Ospf Stats tab Ospf Stats tab ﬁelds Field Description Preﬁx List conﬁguration To create a new preﬁx list, follow this procedure Preﬁx List creationPolicy dialog Preﬁx List tab Preﬁx List tab ﬁelds Field Description To delete a preﬁx list, use the following procedure Preﬁx List deletionDeleting a Preﬁx List Step Action Insert Preﬁx List dialog Policy dialog Route Policy tab Route Policy conﬁgurationRoute Policy tab ﬁelds Field Description IP Routing Conﬁguration and Management To create a new route policy, follow this procedure Route Policy creation Insert Route Policy dialog Insert Route Policy ﬁelds Field Description IP routing conﬁguration using the Java Device Manager Route policy deletion To delete a route policy, use the following procedureDeleting a route policy Step Action Applying Ospf policies Ospf Accept Policy conﬁgurationPolicy dialog Applying Policy tab Applying Policy tab ﬁelds Field Description To create a new Ospf accept policy, follow this procedure Ospf Accept Policy creationPolicy dialog Ospf Accept tab Ospf Accept tab ﬁelds Field Description Ospf Accept Policy deletion Deleting an Ospf accept policy Step ActionInsert Ospf Accept dialog Insert Ospf Accept ﬁelds Field Description Policy dialog RIP In/Out Policy tab RIP In and Out Policy conﬁgurationRIP In/Out Policy tab ﬁelds Field Description Global Vrrp conﬁguration Vrrp dialog Globals tab Vrrp interface creation Vrrp dialog Interface Address tab To delete a Vrrp interface, use the following procedure Vrrp Interface deletionDeleting a Vrrp interface Step Action Insert Interface Address dialog Vrrp interface management Vrrp dialog Interfaces tab IP routing conﬁguration using the Java Device Manager Graphing Vrrp interface information Vrrp Stats dialog Vrrp Stats ﬁelds Field Description Viewing general Vrrp statisticsType ﬁeld Vrrp dialog Stats tab Conﬁguration and management of Brouter ports Ecmp conﬁgurationSelect a port on the Device Manager Front Panel view Creating a Brouter port To create a new brouter port, use the following procedurePort dialog IP Address tab To delete a brouter port, use the following procedure Deleting a Brouter portInsert IP Address dialog Insert IP Address dialog ﬁelds Field Description UDP Forward dialog Protocols tab UDP protocol conﬁgurationInsert Protocols dialog Insert Protocols dialog ﬁelds Field Description UDP forwarding conﬁgurationUDP Forward dialog Forwardings tab UDP forwarding deletion Deleting a UDP forwarding Step ActionInsert Forwardings dialog Insert Forwardings dialog ﬁelds Field Description UDP forwarding list conﬁguration UDP forwarding list creationUDP Forward dialog Forwarding Lists tab Forwarding Lists tab ﬁelds Field Description UDP forwarding list deletion Deleting a UDP forwarding list Step ActionSelect the Forwarding Lists tab Insert Forwarding Lists dialog Conﬁguring UDP broadcast interfaces Select an Id to delete Click DeleteUDP Forward dialog Broadcast Interfaces tab Broadcast Interface tab ﬁelds Field Description UDP broadcast interface creation Insert Broadcast Interfaces dialog UDP broadcast interface deletion Deleting a UDP broadcast interfaceDhcp conﬁguration Insert Broadcast Interfaces dialog ﬁelds Field Description To conﬁgure a Dhcp entry, use the following procedure Creating a Dhcp entry Step ActionDhcp Relay tab Insert Dhcp Relay To delete a Dhcp entry, use the following procedure To enable Dhcp Snooping, use the following procedureDhcp Snooping Dhcp Snooping Vlan Dhcp Snooping port Dhcp Snooping-VLAN tab Dhcp bindings Dhcp Snooping-port tab IP Source Guard port Dhcp Bindings IP Source Guard-port tab IP Source Guard addressesIP Source Guard-addresses tab Vlan Dhcp conﬁguration Following table describes the Dhcp tab ﬁeldsDhcp tab ﬁelds Dhcp tab ﬁelds Fields Description Make changes as necessary in the ﬁelds provided Click Apply Fields Description IP Routing Conﬁguration and Management Conﬁguring Igmp snooping using the Java Device Manager Vlan Snoop tab Vlan Snoop tab ﬁelds Field Description Enabling Igmp Snooping for a Vlan 308 Conﬁguring Igmp snooping using the Java Device Manager Conﬁguring Igmp using Web-based management Igmp Conﬁguration screen Igmp Vlan Setting ﬁelds Field Description Igmp Vlan Conﬁguration screen Conﬁguring Igmp using the Web-based Management Interface Click Submit Vlan Conﬁguration screen reopens and the settings are savedIgmp Multicast Group Membership window Multicast Group Index Non-local static routes Ospf Index Page Conﬁguration-IP Routing Protocols